time flies

Idioms  

1. Time passes quickly, as in It's midnight already? Time flies when you're having fun, or I guess it's ten years since I last saw you—how time flies. This idiom was first recorded about 1800 but Shakespeare used a similar phrase, “the swiftest hours, as they flew,” as did Alexander Pope, “swift fly the years.”

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Example Sentences

"It's difficult to find time to gather and see everyone. This is what we miss. We feel like the time flies very, very fast because we're busy," she says.

From BBC • Oct. 18, 2025

But that time flies by, akin to a cozy night in with an episode binge.

From Los Angeles Times • Dec. 20, 2024

Being a wife & mom still remains priority #1 & I’ve learned that time flies, so I plan to enjoy my family to the fullest!”

From Seattle Times • Apr. 28, 2024

But as time flies by, it will bloom outward in expanding shells or rings of gas and dust.

From Scientific American • Mar. 17, 2023

“You know that saying about how time flies when you’re having fun?”

From "Found" by Margaret Peterson Haddix